Powertrain
generic / SAE
P00CA
Fuel Pressure Regulator A Solenoid Supply Voltage Control Circuit High
Supply voltage to fuel pressure regulator A solenoid above expected range — typically charging system overvoltage. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / CA
Possible causes
- Alternator regulator failed high
- Connector pins corroded - high contact resistance low
- Supply wire pinched against B+ source low
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 50–600 €
- Estimated time: 0.5–3 h
- Component: regulator supply
- Component: charging system
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012